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    Bord and Pillar Method | Mining Classroom

    Bord and Pillar Method of mining involves in the formation of roadways and the development of Mines. The first stage of working of Bord and Pillar Method is Called Development. In the development stage parallel roads are driven nearly at right angle to the first set. These roads are also use to join the separated coal blocks.

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    NSW Mining Methods - NSW Mining

    Bord-and-pillar: Bord-and-pillar, or room-and-pillar, is the oldest underground mining technique and was common in NSW before longwall mining began in the 1960s. This method uses a grid of tunnels and involves progressively cutting panels into the coal seam whilst leaving behind pillars of coal to support the mine. This method has been in ...

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    Major Mines & Projects | Exxaro Coal Central (ECC) Mine

    The remainder of the deeper reserves will be mined by conventional mechanised underground bord and pillar mining method. Opencast mining activities currently targets the No. 2 and 4 seam lower reserves, however all seams thicker than 0.5 m are considered during mining operations.

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    Mining Funda: Bord and Pillar method of Mining

    Bord and pillar mining method comprises two phases i.e DEVELOPMENT and DEPILLARING. Sometimes both these phases proceeds simultaneously. In development, pillars are formed by driving a network of galleries, of which one set is generally parallel to the dip and the other set is parallel to the strike cutting the former at right angles.

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    Toward Pillar Design to Prevent Collapse of Room-and ...

    TOWARD PILLAR DESIGN TO PREVENT COLLAPSE OF ROOM-AND-PILLAR MINES R. Karl Zipf, Jr. Chief, Catastrophic Failure Detection and Prevention Branch ... Traditional strength-based pillar design methods applicable to coal or hard-rock mines use a ... Room-and-pillar mining …

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    Coal Mining Methods - Colorado School of Mines

    Coal Mining Methods Underground Mining Longwall & Room and Pillar Mining Longwall mining and room-and-pillar mining are the two basic methods of mining coal underground, with room-and-pillar being the traditional method in the United States. Both methods are well suited to extracting the relatively flat coalbeds (or coal seams) typical of

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    bord and pillar mining equipment - rodiziogrill.be

    Bord and pillar mining – Coal and coal mining – Te Ara . 2006612&ensp·&enspBord and pillar mining Next. This diagram shows the traditional method of bord and pillar mining. Miners first extracted coal along roadways or bords, while the coal in between the bords acted as pillars holding up the roof.

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    Bord and pillar applications on the platinum mine: T-cut ...

    The T-cut mining method is basically a partial pillar extraction method. The pillar (13 m x 13 m) created by the bord and pillar development is being stoped (only the UG2 reef) out for 2 m from the roadways on all sides, to leave an effective pillar of 9 m x 9 m. This method creates the required, higher extraction percentage and higher Run of

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    MINING METHODS T - cmpdi

    9 Blasting Gallery Method Conventional bord and pillar mining in thick seams is associated with very low percentage of extraction [around 30% in a panel] even under favourable conditions. Extensive development of pillars carried out

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    Gr5finalUnderground Mining Method Ppt | Mining | Economic ...

    Gr5finalUnderground Mining Method Ppt - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. Underground Mining Methods Group 5 Underground Mining Methods Coal Mining Metal Mining Bord and Pillar Unsupported Mining Supported Mining Caving mining Longwall Room and Pillar Cut and fill Longwall Blasting galllery …

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    Bord and pillar mining – Coal and coal mining – Te Ara ...

    This diagram shows the traditional method of bord and pillar mining. Miners first extracted coal along roadways or bords, while the coal in between the bords acted as pillars holding up the roof. Then the outer pillars were mined, leaving the roof to ...

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    EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL COAL MINES ... Bord and Pillar method of mining is one of the oldest methods. The key to the successful Bord and Pillar mining is selecting the optimum pillar size. If the pillars are too small the mine will collapse. If the pillars are too large then significant

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    (PDF) Pillar design in coal mines - ResearchGate

    The paper points out that bord-and-pillar mining is the most important method of coal extraction in South African underground coal mines, and advocates that pillar design procedures should be ...

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    Room and Pillar Mining Method - SlideShare

    Oct 22, 2014· Room and Pillar Mining Method 1. Hassan Z. Harraz [email protected] 2014- 2015 This material is intended for use in lectures, presentations and as handouts to students, and is provided in Power point format so as to allow customization for the individual needs of course instructors.

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    Room-and-pillar mining | coal mining | Britannica

    Other articles where Room-and-pillar mining is discussed: mining: Room-and-pillar mining: The most common mining system is room-and-pillar. In this system a series of parallel drifts are driven, with connections made between these drifts at regular intervals. When the distance between connecting drifts is the same as that between the parallel drifts, then a…

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    THE MODERN WONGAWILLI METHOD – Mining Science and …

    Home / Bord & Pillar / Method / Modern Pillar Extraction ... The size of the stooks and fenders can be changed as dictated by prevailing conditions and experience of the mining officials. ... output is attributed to the deployment of continuous bridge conveying or chain haulage system with place change method of heading development and pillar ...

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    Increasing Production Time in Continuous Mining Methods

    Increasing Production Time in Continuous Mining Methods EE Dorey D McGinness SYNOPSIS The use of continuous miners in a conventional bord and pillar section results in a considerable amount of unproductive time. This is due to the roof support requirements, continuous miner configurations, and shuttle car 'change-outs'. These factors have

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    Study Material | Mine Portal - India's Mining Exams ...

    Bord & Pillar Method Of Working CLICK HERE TO DOWNLOAD NOTES FOR BORD & PILLAR METHOD OF WORKING Notes Cover following topics Bord and Pillar method: Schemes of development; design of bord and pillar working; statutory provisions; selection of equipment for development -mechanised loaders, continuous miners etc.preparatory arrangement for depillaring; …

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    Pillar Extraction using Continuous Miners | Introduction ...

    PILLAR EXTRACTION USING CONTINUOUS MINERS. Overview. Now that longwall equipment has been developed to a stage where it is able to cope with most conditions satisfactorily, longwall mining is the most widely used method of secondary extraction. However, there are still mines and occasions where longwall mining is not suitable e.g.

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    Bord and pillar mining method pdf - dirtycanadians.com

    Characteristic of r & p it is the most common supported pillar method, designed and used primarily for mining flat-lying seams, or tabular orebodies, or gently dipping bedded ore deposits of 4/16/2013. bord and pillar method applicability of bord & pillar method вђў a seam thicker than 1.5 m. вђў a seam free from stone or dirt bands.

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    Room and pillar mining - Wikipedia

    Feb 27, 2016· One of such methods is the Bord and Pillar method of mining. Bord and Pillar method of mining is one of the oldest methods. 3. INTRODUCTION In India, about 98% of underground output of coal is obtained by Bord and Pillar method and barely about 2% by longwall methods.

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    Major Mines & Projects | Wessels Mine

    Mining Methods. Bord-and-pillar; Summary: Wessels is an underground bord and pillar operation with a current capacity of approximately 1.2 Mtpa of ROM production (100 per cent basis). Processing Technologies. Summary: Primary crushing of ore takes place underground, while secondary crushing forms part of the surface operations. ROM ore is ...

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    Bord & Pillar Method | Mining | Coal - Scribd

    Basic parameters of bord and pillar mining system 1. Gallery (bord) 2. Pillar. 3. Junction. Calculation of percentage of extraction during development If coal from the full seam thickness is extracted, the percentage of extraction during development is nearly 20% in deep mines and 35% in shallow mines.

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    Principles of Room & Pillar Mining - YouTube

    Sep 10, 2012· This video provides a basic description of the room & pillar mining method for extracting coal underground. It includes an explanation of the different products working together in a room & pillar ...

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    Bord & Pillar – Mining Science and Technology

    As bord and pillar workings are developed roof support becomes a major consideration and operating cost item. Support requirements vary considerably and are dependent on the physical conditions in the seam, which are often depth dependent, and the length of …

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    Definition of bord-and-pillar method - mindat.org glossary

    Definition of bord-and-pillar method. A system of mining in which the distinguishing feature is the winning of less than 50% coal on the first working. It is more an extension of the development work than mining. The second working is similar in principle to top slicing. The remainder of the coal is won by a retreating system, the cover being ...

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    Board & Pillar? | Coal, Colliery and Mining Forum.

    Mar 24, 2013· Bord and pillar, (same as board I guess), Post and Stall, Stall Worked, and here is one up for grabs, for some reason I cannot shake off the thought that I recall this method being referred to as Pillar and Post locally at least, I know that it seems to be nonsensical by virtue of both terms being support methods, but we are a queer lot in this corner anyway (tail-gate corner that is, probably ...

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    Bord-and-pillar | Definition of Bord-and-pillar by Merriam ...

    Bord-and-pillar definition is - of or relating to a system of coal mining in which tunnels are driven in a checkerboard pattern having massive square pillars between them …

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    Longwall Mining - an overview | ScienceDirect Topics

    At present, production by longwall mining accounts for a minor amount of total underground mining production with the majority coming from bord-and-pillar methods. Since it is envisaged that longwall mining will require time to become established in India, bord-and-pillar methods will continue to be dominant in the foreseeable future. Thus, it ...

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    Bord-and-pillar mining explained | Illawarra Mercury

    May 31, 2017· Two main methods of extraction are used for underground coal mines in New South Wales: longwall and bord-and-pillar extraction. Bord-and-pillar extraction is the older of the methods…

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